syzkaller login: [ 31.272389] BUG: Bad rss-counter state mm:00000000d13c0e58 type:MM_FILEPAGES val:33 [ 31.273484] BUG: Bad rss-counter state mm:00000000d13c0e58 type:MM_ANONPAGES val:22 [ 31.428455] ================================================================== [ 31.429633] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.430946] Read of size 8 at addr ffff88801a64d968 by task sshd/219 [ 31.431839] [ 31.432067] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.433015] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.434069] Call Trace: [ 31.434410] [ 31.434711] dump_stack_lvl+0x91/0xf0 [ 31.435229] print_report+0xcc/0x620 [ 31.435739] ? __virt_addr_valid+0x102/0x340 [ 31.436313] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.436969] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.437622] kasan_report+0xbe/0xf0 [ 31.438116] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.438777] vma_interval_tree_remove+0xc75/0xec0 [ 31.439414] vma_prepare+0xc54/0x11a0 [ 31.439922] __split_vma+0x5af/0x950 [ 31.440419] ? __pfx___split_vma+0x10/0x10 [ 31.441002] ? find_held_lock+0x2c/0x110 [ 31.441556] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.442163] ? lock_is_held_type+0x9f/0x120 [ 31.442722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.443358] ? mtree_range_walk+0x632/0x900 [ 31.443941] ? mas_walk+0x5c7/0x7c0 [ 31.444447] do_vmi_munmap+0x1f1/0x2b0 [ 31.444981] mmap_region+0x1f9/0x2660 [ 31.445493] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.446030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.446779] ? __pfx_lock_acquire+0x10/0x10 [ 31.447344] ? __pfx_mmap_region+0x10/0x10 [ 31.447909] ? security_mmap_addr+0x7d/0xa0 [ 31.448468] ? get_unmapped_area+0x1f5/0x3f0 [ 31.449075] do_mmap+0x854/0xf00 [ 31.449536] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.450055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.450652] ksys_mmap_pgoff+0x3af/0x500 [ 31.451184] do_syscall_64+0x3f/0x90 [ 31.451680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.452358] RIP: 0033:0x7f1e021c8d82 [ 31.452834] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.455081] RSP: 002b:00007ffc1ab1a1c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.456031] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e021c8d82 [ 31.456935] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e01602000 [ 31.457834] RBP: 00007f1e01602000 R08: 0000000000000009 R09: 0000000000001000 [ 31.458720] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a9234e3b20 [ 31.459610] R13: 00007ffc1ab1a1e0 R14: 00007ffc1ab1a210 R15: 00007ffc1ab1a570 [ 31.460503] [ 31.460809] [ 31.461046] Allocated by task 212: [ 31.461490] kasan_save_stack+0x22/0x50 [ 31.462022] kasan_set_track+0x25/0x30 [ 31.462544] __kasan_slab_alloc+0x59/0x70 [ 31.463091] kmem_cache_alloc+0x16b/0x370 [ 31.463630] vm_area_dup+0x20/0x160 [ 31.464104] __split_vma+0x170/0x950 [ 31.464591] split_vma+0xc6/0x110 [ 31.465069] mprotect_fixup+0x8d2/0xb30 [ 31.465592] do_mprotect_pkey+0x87e/0xd40 [ 31.466140] __x64_sys_mprotect+0x78/0xc0 [ 31.466688] do_syscall_64+0x3f/0x90 [ 31.467189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.467860] [ 31.468084] Freed by task 212: [ 31.468494] kasan_save_stack+0x22/0x50 [ 31.469049] kasan_set_track+0x25/0x30 [ 31.469566] kasan_save_free_info+0x2b/0x50 [ 31.470134] __kasan_slab_free+0x10a/0x190 [ 31.470699] kmem_cache_free+0x10d/0x4d0 [ 31.471235] rcu_core+0x8c8/0x2860 [ 31.471696] __do_softirq+0x1b7/0x7d4 [ 31.472198] [ 31.472420] Last potentially related work creation: [ 31.473031] kasan_save_stack+0x22/0x50 [ 31.473552] __kasan_record_aux_stack+0x8e/0xa0 [ 31.474133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.474777] remove_vma+0x139/0x170 [ 31.475228] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.475807] do_vmi_munmap+0x1f1/0x2b0 [ 31.476294] __vm_munmap+0x138/0x3a0 [ 31.476761] __x64_sys_munmap+0x59/0x80 [ 31.477265] do_syscall_64+0x3f/0x90 [ 31.477740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.478396] [ 31.478611] The buggy address belongs to the object at ffff88801a64d910 [ 31.478611] which belongs to the cache vm_area_struct of size 168 [ 31.480096] The buggy address is located 88 bytes inside of [ 31.480096] freed 168-byte region [ffff88801a64d910, ffff88801a64d9b8) [ 31.481531] [ 31.481747] The buggy address belongs to the physical page: [ 31.482419] page:000000004b957e48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a64d [ 31.483517] memcg:ffff88800cad2001 [ 31.483949] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.484595] page_type: 0xffffffff() [ 31.485058] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.485975] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cad2001 [ 31.486876] page dumped because: kasan: bad access detected [ 31.487536] [ 31.487755] Memory state around the buggy address: [ 31.488342] ffff88801a64d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.489210] ffff88801a64d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.490070] >ffff88801a64d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.490922] ^ [ 31.491708] ffff88801a64d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.492562] ffff88801a64da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.493431] ================================================================== [ 31.494471] Disabling lock debugging due to kernel taint [ 34.054465] BUG: Bad rss-counter state mm:00000000e934f433 type:MM_FILEPAGES val:33 [ 34.055458] BUG: Bad rss-counter state mm:00000000e934f433 type:MM_ANONPAGES val:22 [ 34.432720] BUG: Bad rss-counter state mm:000000006709cb22 type:MM_FILEPAGES val:33 [ 34.434156] BUG: Bad rss-counter state mm:000000006709cb22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4462' (ECDSA) to the list of known hosts. 2023/06/20 22:19:24 fuzzer started 2023/06/20 22:19:25 dialing manager at localhost:36067 2023/06/20 22:19:25 checking machine... 2023/06/20 22:19:25 checking revisions... [ 35.206994] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:19:25 testing simple program... [ 35.252449] cgroup: Unknown subsys name 'net' [ 35.297307] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:19:24 Registers: info registers vcpu 0 RAX=ffffffff860d2fdd RBX=0000000000000002 RCX=ffffffff860d2fdc RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c1a5fb RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff860d2fe0 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09e68 R15=ffff88806ce09a70 RIP=ffffffff81130b82 RFL=00000213 [----A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa3d3228900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fa3d2631ab0 CR3=000000000c6f4000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2d35f9dcc08ce56200000000000ae988 XMM05=b350f0da34a17e050000000000132f00 XMM06=1b33663df48a94550000000000131ca0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86138e91 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008e379b0 RSP=ffff888008e378e8 R8 =ffffffff86138e90 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008e379b8 R13=ffff888008e379a0 R14=ffff888008e37999 R15=ffff888008e37958 RIP=ffffffff81130ab5 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffd04830000 CR3=000000000cb24000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000